As for the interior, I'm going to have to go with corsachili on this one, but then again, I'm not a fan of diamond-patterned interiors, like on the Spyker and this car, they just look archaic to me.
Interior:
I do like the leather-wrapped door pulls.
I don't like the aluminum center console, I'd have made it black, and probably put in a nav system.
I would not have done all red, I would have gone a two-tone black and red. Breaks things up a bit.
I would have kept the wood, albeit clearcoated it and buffed it up a bit.
The gauge cluster is both good and bad. I like the gauges themselves, especially that quad combo one, but the whole thing looks very empty, and I would have kept the wood.
Te window switch relocation, while very "Maserati-ish", looks very out of place.
Exterior:
Highlighting the lower intake breaks the lines of the car. Not a fan. If it had been left black, that probably would have been better, or at least more subtle. Of course, with a 50's red interior, perhaps that isn't what the creator is going for.
I much prefer the 4 headlights. With duals, it looks a lot more like a big 2002.
17" wheels look too big on this car, and I'm not a fan of the basketweaves in the first place, they look too busy.
Nice paint.
Engine-
It says it has a M5 block (whatever that means, probably a M90) but if you are using a M5 block, why not use a M5 head? It would probably improve his power output by 20%.
I like that he used a twin-screw. His method of mounting is more than a touch odd, though. I figured it would go above the headers, since the fresh air intake was already on that side. It looks more like he shoehorned it in there in front of the brake master cylinder.
Given his boost level (1.6 bar) I'd also have gone with a larger charger. If he wants any more, he'll have to anyway, since the thing is already at ~14.5 @6k RPM right now. His post-charger temps must be through the roof, since the output temp starts going up much more past ~12k or so.
It also looks like he completely eliminated the heater box to both move the engine back and probably to ft the T-56. It is a good thing he braced it.
It is a little hard to see, but it looks like he's got some 3->2->1 headers, rather than a set of full Stahls or something akin to that, probably ue to the trans again. He could probably pick up some more ponies with better headers.
Overall, certainly a piece of work, and I do like the drivetrain, but I am not much of a fan about certain aspects.